primogenitorPronunciation: /ˌprʌɪmə(ʊ)ˈdʒɛnɪtə/Definition of primogenitor noun an ancestor, especially the earliest ancestor of a people; a progenitor. Origin: mid 17th century: variant of progenitor, on the pattern of primogenitureprimogenitor in other Oxford dictionaries Definition of primogenitor in the US English dictionary
